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| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2013-06-24 15:57:37 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-07-26 13:28:26 -0300 |
| commit | ac22521cb2dc07e0b2193868c647dee5d737f85a (patch) | |
| tree | 0bbcb7f5d52aa0f82698278f2987272bc838064b /drivers/media/usb | |
| parent | 3333447c6946f8a76548d1599686a2bbd11e9264 (diff) | |
| download | blackbird-obmc-linux-ac22521cb2dc07e0b2193868c647dee5d737f85a.tar.gz blackbird-obmc-linux-ac22521cb2dc07e0b2193868c647dee5d737f85a.zip | |
[media] tlg2300: fix checking firmware in poseidon_probe()
check_firmware() makes sure firmware is in a device.
It returns zero on success and error code otherwise.
Also it sets down_firmware flag to 1 if downloading occurs.
The only caller poseidon_probe() checks down_firmware flag and
returns 0 without any initialization if it is set.
That looks very strange, so the patch removes down_firmware argument
of check_firmware() and returns error code if check_firmware() fails
in poseidon_probe().
Not tested on real hardware.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/tlg2300/pd-main.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/media/usb/tlg2300/pd-main.c b/drivers/media/usb/tlg2300/pd-main.c index ca5e1bc99d8d..95f94e5aa66d 100644 --- a/drivers/media/usb/tlg2300/pd-main.c +++ b/drivers/media/usb/tlg2300/pd-main.c @@ -375,7 +375,7 @@ static inline void set_map_flags(struct poseidon *pd, struct usb_device *udev) } #endif -static int check_firmware(struct usb_device *udev, int *down_firmware) +static int check_firmware(struct usb_device *udev) { void *buf; int ret; @@ -395,10 +395,8 @@ static int check_firmware(struct usb_device *udev, int *down_firmware) USB_CTRL_GET_TIMEOUT); kfree(buf); - if (ret < 0) { - *down_firmware = 1; + if (ret < 0) return firmware_download(udev); - } return 0; } @@ -411,9 +409,9 @@ static int poseidon_probe(struct usb_interface *interface, int new_one = 0; /* download firmware */ - check_firmware(udev, &ret); + ret = check_firmware(udev); if (ret) - return 0; + return ret; /* Do I recovery from the hibernate ? */ pd = find_old_poseidon(udev); |
